1-bromo-3-benzenesulfonylmethyl-2,5-dimethoxymethylbenzene

[1(3Z,5R,6S,7S),3R]-N-{3-[7-(tert-butyl-dimethylsilyloxy)-9-oxo-4,6-dimethyl-5-triisopropylsilyloxy-non-3-enyl]-2,5-dimethoxy-phenyl}-3-methoxy--4-oxo-N-(2,2,2-trichloroethoxymethyl)-butyramide